Chop the onion, cabbage, bell pepper, celery, and tomato into bite-sized pieces.
Add olive oil to a pot and sauté the onion.
Add the cabbage, bell pepper, and celery and stir-fry together.
Add the tomato and water.
Season with bay leaf, salt, pepper, and other spices.
Bring to a boil, then simmer on low heat until the ingredients are tender.